PUF (Physical Unclonable Function) auxiliary device and PUF-based anti-counterfeit label and unique identity identification device

Abstract

The utility model discloses a PUF (Physical Unclonable Function) auxiliary device, an anti-counterfeit label based on PUF and a unique identity identification device. The PUF auxiliary device structurally comprises a contact layer, a grounding layer, a dielectric layer, a signal layer, a protective layer and a shielding layer from bottom to top, the layers are fixed through interlayer mucilage glue; the signal layer is connected with an external PUF functional circuit through a signal input end to receive input, and is connected with the external PUF functional circuit through a signal output end to return output; and the grounding layer is connected with an external PUF functional circuit through a grounding end and is in common ground. The PUF auxiliary device provided by the utility model can generate irreversible change when the same input signal and output signal are deformed, disassembled, assembled and / or damaged, and the PUF auxiliary device is matched with the PUF functional circuit to generate PUF information change, so that the sensing of disassembly, assembly and detection of devices on equipment is realized, the PUF technology is applied to the equipment and device protection layer, and the safety of the equipment is improved. And the data security capability of equipment and devices is enhanced. PUF information generated by the device in cooperation with the PUF functional circuit is unique identity information and serves as an identity label of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of data security, and in particular to a PUF auxiliary device and a PUF-based anti-counterfeiting label and a unique identity identification device. Background Art

[0002] PUF technology is an important hardware security technology. It uses the inherent random properties of the hardware manufacturing process to extract unclonable physical features to generate unique identity information. It uses the "generating information" method instead of the "saving information" method to improve security. It is an effective technology to improve data security. At present, PUF technology is still mainly used inside semiconductor chips. At the device level, due to the lack of effective methods to extract unclonable physical features, the use of PUF technology at the device protection level is limited, and PUF technology cannot be used to improve the data security capabilities of devices. Utility Model Content

[0003] Technical problems to be solved by the utility model: In view of the above problems of the prior art, a PUF auxiliary device and an anti-counterfeiting label and unique identity identification device based on PUF are provided. The utility model aims to realize that for the same input signal, the output signal will undergo irreversible changes when the device is deformed, disassembled and / or damaged, and the PUF functional circuit generates PUF information changes, which can realize the perception of the disassembly and detection of devices on the device, apply PUF technology to the protection level of devices and devices, and enhance the data security capabilities of devices and devices. At the same time, the PUF information generated by the device in conjunction with the PUF functional circuit is also a unique identity information, which can be used as the identity of the device.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A PUF auxiliary device, characterized in that the device structure includes a contact layer, a ground layer, a dielectric layer, a signal layer, a protective layer, and a shielding layer from bottom to top; wherein the layers are fixed with interlayer adhesive; the signal layer is connected to an external PUF functional circuit through a signal input terminal to receive input, and is connected to an external PUF functional circuit through a signal output terminal to return output; the ground layer is connected to a common ground with an external PUF functional circuit through a ground terminal.

[0006] Among them, the ground layer, dielectric layer, and signal layer are the main functional parts. When the device is deformed, disassembled, and / or damaged, the main functional parts are destroyed and cannot be restored, thereby causing irreversible changes in the output signal for the same input signal. The signal output change is generated according to the electrical characteristics such as parasitic capacitance, resistance, and inductance between the ground layer, dielectric layer, and signal layer, which can be sensed and used by the PUF functional circuit. The contact layer is a fixed part of the device and plays the role of fixing the device. The protective layer and shielding layer are the main functional protection parts of the device to protect the stability of the main function.

[0007] Optionally, the grounding layer is an electrical grounding part, which is connected to the PUF functional circuit by punching a contact layer or directly wiring, and is one of the main functional parts. It can be selected to include but is not limited to using a fragile conductive film or a conductive carbon paste coating designed in an irregular shape, and the grounding end is connected to the external PUF functional circuit by punching a contact layer.

[0008] Optionally, the signal layer is the signal transmission part, which is one of the main functional parts. It can be selected to include but not limited to using a fragile conductive film or a conductive carbon paste coating in a winding form, including a signal input end and a signal output end, and the signal input end and the signal output end are connected to the external PUF functional circuit by punching a contact layer.

[0009] Optionally, the dielectric layer is a high dielectric constant insulating layer, which is not connected to the outside world and is one of the main functional parts. It uses a high dielectric constant brittle insulating material, such as a ceramic powder compressed block or an aluminum nitride powder compressed block.

[0010] Optionally, the contact layer is the part in contact with the device, and is mainly used to fix the supporting device and protect the insulation of the device and the equipment. The optional fixing methods include but are not limited to adhesive, welding, screws and / or nails.

[0011] Optionally, the protective layer is a main functional protection part, which is mainly used to prevent the main functional part from being disturbed by contact, and adopts soft insulating material such as foam or cotton paper.

[0012] Optionally, the shielding layer is a main functional protection part, which is mainly used to protect the main functional part from electromagnetic interference, and adopts fragile conductive shielding materials such as tin foil, aluminum foil or hand-torn steel.

[0013] Optionally, the interlayer adhesive is a strong adhesive, wherein if the ground layer and the signal layer are connected to the PUF functional circuit by punching holes in the contact layer, the punching position is not covered with the strong adhesive and is not electrically processed.

[0014] In addition, the utility model also provides a PUF-based anti-counterfeiting label, including the above-mentioned PUF auxiliary device and the PUF functional circuit, the above-mentioned PUF auxiliary device is fixed on the anti-counterfeiting main body and connected to the PUF functional circuit. As an anti-counterfeiting label of the device, the bottom layer of the PUF auxiliary device is glued to the anti-counterfeiting main body, and the top layer can be printed with a custom pattern.

[0015] In addition, the utility model also provides a PUF-based unique identity identification device, including the above-mentioned PUF auxiliary device and PUF functional circuit. The above-mentioned PUF auxiliary device is fixed on the subject to be identified and connected to the PUF functional circuit. The generated PUF information is used as the unique identity identification of the subject.

[0016] Compared with the prior art, the utility model has the following advantages: for the same input signal, the output signal of the utility model device will undergo irreversible changes when the device is deformed, disassembled and / or damaged, and the PUF information changes generated by the PUF functional circuit can realize the perception of the disassembly and detection of devices on the device, apply PUF technology to the protection level of devices and devices, and enhance the data security capabilities of devices and devices. At the same time, the PUF information generated by the device in conjunction with the PUF functional circuit is also a unique identity information, which can be used as the identity of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic side view of the overall structure of the first embodiment of the utility model.

[0018] Figure 2 This is a system schematic diagram of Embodiment 1 of the present utility model.

[0019] Figure 3 This is a schematic diagram of the main functional part of the first embodiment of the utility model.

[0020] Legend: 1. Contact layer; 2. Ground layer; 3. Dielectric layer; 4. Signal layer; 5. Protective layer; 6. Shielding layer;

[0021] 7. Interlayer adhesive; 8. Signal input terminal; 9. Signal output terminal; 10. Ground terminal. DETAILED DESCRIPTION

[0022] Embodiment 1:

[0023] like Figure 1 , Figure 2As shown, this embodiment is a PUF auxiliary device, and the device structure includes a contact layer 1, a ground layer 2, a dielectric layer 3, a signal layer 4, a protective layer 5, and a shielding layer 6 from bottom to top; wherein, the layers are fixed by an interlayer adhesive 7; the signal layer 4 is connected to the external PUF functional circuit through the signal input terminal 8 to receive input, and is connected to the external PUF functional circuit through the signal output terminal 9 to return output; the ground layer 2 is connected to the external PUF functional circuit through the ground terminal 10. The ground layer 2, the dielectric layer 3, and the signal layer 4 are the main functional parts. When the device is deformed, disassembled and / or damaged, the main functional parts are destroyed and cannot be restored, thereby causing irreversible changes in the output signal for the same input signal; the output signal change is generated according to the electrical characteristics such as parasitic capacitance, resistance and inductance between the ground layer 2, the dielectric layer 3, and the signal layer 4, which can be sensed and used by the PUF functional circuit. The contact layer 1 is a fixed part of the device, which plays the role of fixing the device. The protective layer 5 and the shielding layer 6 are the main functional protection parts of the device, which protect the main functional parts to work stably. Through the device in this embodiment, the PUF functional circuit can realize the perception of the disassembly and detection of the device or device, thereby applying the PUF technology to the protection level of the device or device and enhancing the data security capability of the device or device. At the same time, the PUF information generated by the device in conjunction with the PUF functional circuit is also a unique identity information, which can be used as the identity of the device or device.

[0024] like Figure 1 , Figure 3 As shown, as an optional implementation, the grounding layer 2 is the electrical grounding part, and the conductive carbon paste coating is designed in an irregular shape. Of course, a conductive film can also be used; the grounding terminal 10 is connected to the PUF functional circuit by punching the contact layer 1, and the punching position is not covered with interlayer adhesive and is electrically processed. The conductive carbon paste will produce irregular diffusion when drawing the pattern, and the irregular shape coating is fragile and difficult to recover. Therefore, when the device is deformed, disassembled and / or damaged, the grounding layer 2 will produce irreversible changes, thereby causing the output signal to change for the same input signal, and cooperating with the PUF functional circuit to cause the PUF information to change.

[0025] like Figure 1 , Figure 3As shown, as an optional embodiment, the signal layer 4 is the signal transmission part, including the signal input terminal 8 and the signal output terminal 9, and is designed in the form of winding using a conductive carbon paste coating. Of course, a conductive film can also be used; the signal input terminal 8 and the signal output terminal 9 are connected to the PUF functional circuit by punching the contact layer 1, and the punching position is not covered with interlayer adhesive and is not electrically processed. The conductive carbon paste will produce random diffusion when drawing the winding, and the diffused winding form can produce random electrical characteristics. At the same time, the winding form coating is fragile and difficult to recover. Therefore, when the device is deformed, disassembled and / or damaged, the signal layer 4 undergoes irreversible changes, thereby causing the output signal to change for the same input signal, and cooperating with the PUF functional circuit to cause the PUF information to change.

[0026] like Figure 1 , Figure 3 As shown, as an optional implementation, the dielectric layer 3 uses a ceramic powder compressed block with a high dielectric constant, and of course, an aluminum nitride powder compressed block can also be used. At the same time, the powder compressed block is fragile and difficult to recover. Therefore, when the device is deformed, disassembled and / or damaged, the dielectric layer 3 undergoes irreversible changes, thereby causing the output signal to change for the same input signal, and cooperating with the PUF functional circuit to cause the PUF information to change.

[0027] like Figure 1 As shown, as an optional embodiment, the contact layer 1 is fixed by a combination of adhesive and screws, wherein the vias of the signal input terminal 8, the signal output terminal 9 and the ground terminal 10 are fixed by screws to ensure electrical contact, and other positions are covered with insulating glue.

[0028] like Figure 1 As shown, as an optional embodiment, the protective layer 5 is made of cotton paper material, which is soft, insulating, tough, elastic, and has a low dielectric constant. Of course, foam can also be used; it can ensure that contact interference has no effect on the operation of the main functional parts.

[0029] like Figure 1 As shown, as an optional implementation, the shielding layer 6 is made of aluminum foil, which is thin and has good shielding performance. Of course, tin foil or hand-torn steel can also be used; it can effectively prevent electromagnetic interference from affecting the working of the main functional parts.

[0030] like Figure 1 As shown, as an optional embodiment, the interlayer adhesive 7 is a strong adhesive.

[0031] In summary, the present embodiment discloses a PUF auxiliary device structure, including a fixed layer, a ground layer, a dielectric layer, a signal layer, a protective layer, and a shielding layer; wherein the ground layer, the dielectric layer, and the signal layer are the main functional parts, which are destroyed and cannot be restored when the device is deformed, disassembled, and / or damaged, thereby causing the output signal to change for the same input signal, and cooperating with the PUF functional circuit to cause the PUF information to change. The output signal change is generated according to the electrical characteristics such as parasitic capacitance, resistance, inductance, etc. between the ground layer, the dielectric layer, and the signal layer, which can be sensed and used by the PUF functional circuit. The fixed layer is the fixed part of the device, which plays the role of fixing the device. The protective layer and the shielding layer are the main functional protection parts of the device, which protect the main function to work stably. The utility model realizes a PUF functional circuit auxiliary device. For the same input signal, the output signal of the device will undergo irreversible changes when the device is deformed, disassembled, damaged, etc., and the PUF functional circuit generates PUF information changes, which can realize the perception of disassembly and detection of equipment and devices, apply PUF technology to the protection level of equipment or devices, and enhance the data security capabilities of equipment or devices. At the same time, the PUF information generated by the device in conjunction with the PUF functional circuit is also a unique identity information, which can be used as the identity of the device.

[0032] Embodiment 2:

[0033] This embodiment is basically the same as the first embodiment, with the main difference being that the form of this embodiment is an anti-counterfeiting label, in which the contact layer 1 of the PUF auxiliary device of the utility model is connected and fixed to the device body by a full adhesive method, and is connected to the PUF functional circuit; wherein the electrical contact part uses conductive adhesive, and the non-electrical contact part uses insulating adhesive. The anti-counterfeiting label form can achieve the purpose of being immediately attached and used.

[0034] Embodiment three:

[0035] This embodiment is basically the same as the first embodiment, and the main difference is that the form of this embodiment is a unique identity identification device based on PUF, and the contact layer 1 of the PUF auxiliary device of the utility model is connected and fixed to the subject to be identified by a full adhesive method, and connected to the PUF functional circuit; wherein the electrical contact part uses conductive adhesive, and the non-electrical contact part uses insulating adhesive. The PUF information generated by the PUF functional circuit is used as the unique identity identification of the subject.

[0036] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A PUF auxiliary device, characterized in that: The device structure includes a contact layer, a ground layer, a dielectric layer, a signal layer, a protective layer, and a shielding layer from bottom to top; wherein the layers are fixed with interlayer adhesive; the signal layer is connected to an external PUF functional circuit through a signal input terminal to receive input, and is connected to an external PUF functional circuit through a signal output terminal to return output; the ground layer is connected to a common ground with an external PUF functional circuit through a ground terminal.

2. The PUF auxiliary device according to claim 1, characterized in that: The signal layer is designed in a winding form using a fragile conductive film or a conductive carbon paste coating, and includes a signal input end and a signal output end, and the signal input end and the signal output end are connected to an external PUF functional circuit by punching a contact layer.

3. The PUF auxiliary device according to claim 1, characterized in that: The grounding layer is an electrical grounding part, which is designed in an irregular shape using a fragile conductive film or a conductive carbon paste coating, and the grounding end is connected to the external PUF functional circuit by punching a hole in the contact layer.

4. The PUF auxiliary device according to claim 1, characterized in that: The dielectric layer is made of a high dielectric constant brittle insulating material.

5. The PUF auxiliary device according to claim 1, characterized in that: The protective layer is made of soft insulating material.

6. The PUF auxiliary device according to claim 1, characterized in that: The shielding layer adopts fragile conductive shielding material.

7. The PUF auxiliary device according to claim 1, characterized in that: The interlayer adhesive is a strong adhesive.

8. The PUF auxiliary device according to claim 1, characterized in that: The contact layer is fixed to the device by means of adhesive, welding, screws and / or nails, and the contact layer also plays a role of insulation from the device.

9. A PUF-based anti-counterfeiting label, characterized in that: The invention comprises the PUF auxiliary device and the PUF functional circuit as claimed in any one of claims 1 to 8, wherein the PUF auxiliary device as claimed in any one of claims 1 to 8 is fixed on the anti-counterfeiting main body and connected with the PUF functional circuit.

10. A unique identity identification device based on PUF, characterized in that: The invention comprises the PUF auxiliary device and the PUF functional circuit as claimed in any one of claims 1 to 8. The PUF auxiliary device as claimed in any one of claims 1 to 8 is fixed on a main body to be marked and connected to the PUF functional circuit.

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